#region Utf8Json License https://github.com/neuecc/Utf8Json/blob/master/LICENSE
// MIT License
//
// Copyright (c) 2017 Yoshifumi Kawai
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#endregion

using System;
using System.Reflection;

namespace Nest.Utf8Json
{
	internal interface IJsonFormatterResolver
	{
		IJsonFormatter<T> GetFormatter<T>();
	}

	internal static class JsonFormatterResolverExtensions
	{
		public static IJsonFormatter<T> GetFormatterWithVerify<T>(this IJsonFormatterResolver resolver)
		{
			IJsonFormatter<T> formatter;
			try
			{
				formatter = resolver.GetFormatter<T>();
			}
			catch (TypeInitializationException ex)
			{
				Exception inner = ex;
				while (inner.InnerException != null)
					inner = inner.InnerException;

				throw inner;
			}

			if (formatter == null)
				throw new FormatterNotRegisteredException(typeof(T).FullName + " is not registered in this resolver. resolver:"
					+ resolver.GetType().Name);

			return formatter;
		}

		private static readonly MethodInfo GetFormatterMethod =
			typeof(IJsonFormatterResolver).GetRuntimeMethod(nameof(IJsonFormatterResolver.GetFormatter), Type.EmptyTypes);

		public static object GetFormatterDynamic(this IJsonFormatterResolver resolver, Type type)
		{
			var formatter = GetFormatterMethod.MakeGenericMethod(type).Invoke(resolver, null);
			return formatter;
		}
	}

	internal class FormatterNotRegisteredException : Exception
	{
		public FormatterNotRegisteredException(string message) : base(message) { }
	}
}
